Quantitative phase imaging by three-wavelength digital holography

Three-wavelength digital holography is applied to obtain surface height measurements over several microns of range, while simultaneously maintaining the low noise precision of the single wavelength phase measurement. The precision is preserved by the use of intermediate synthetic wavelength steps ge...

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Bibliographic Details
Published in:Optics express 2008-06, Vol.16 (13), p.9753-9764
Main Authors: Mann, Christopher J, Bingham, Philip R, Paquit, Vincent C, Tobin, Kenneth W
Format: Article
Language:English
Subjects:
ACCURACY
Algorithms
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
HOLOGRAPHY
Holography - methods
Image Enhancement - methods
Image Interpretation, Computer-Assisted - methods
Signal Processing, Computer-Assisted
WAVELENGTHS
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Summary:Three-wavelength digital holography is applied to obtain surface height measurements over several microns of range, while simultaneously maintaining the low noise precision of the single wavelength phase measurement. The precision is preserved by the use of intermediate synthetic wavelength steps generated from the three wavelengths and the use of hierarchical optical phase unwrapping. As the complex wave-front of each wavelength can be captured simultaneously in one digital image, real-time performance is achievable.
ISSN:1094-4087
1094-4087
DOI:10.1364/oe.16.009753